EP1260621B1 - Device for separating warp yarns on a face-to-face weaving machine - Google Patents

Device for separating warp yarns on a face-to-face weaving machine Download PDF

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Publication number
EP1260621B1
EP1260621B1 EP02076298A EP02076298A EP1260621B1 EP 1260621 B1 EP1260621 B1 EP 1260621B1 EP 02076298 A EP02076298 A EP 02076298A EP 02076298 A EP02076298 A EP 02076298A EP 1260621 B1 EP1260621 B1 EP 1260621B1
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EP
European Patent Office
Prior art keywords
separating
warp yarns
holding
face
intermediate part
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Expired - Lifetime
Application number
EP02076298A
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German (de)
English (en)
French (fr)
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EP1260621A1 (en
Inventor
Johny Debaes
Dominique Maes
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Individual
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Individual
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D39/00—Pile-fabric looms
    • D03D39/16—Double-plush looms, i.e. for weaving two pile fabrics face-to-face

Definitions

  • This invention relates to a device for separating warp yarns on a face-to-face weaving machine, comprising at least one separating means and a holding device provided to keep the separating device at a holding height and to adjust this holding height (see EP-A-0 671 494).
  • backing warp yarns for instance tension warp yarns and binding warp yarns
  • backing warp yarns for instance tension warp yarns and binding warp yarns
  • an upper shed is formed between a number of backing warp yarns
  • a lower shed is formed between a number of other backing warp yarns.
  • This shed forming occurs by means of shed forming means that can bring the warp yarns into two different positions. Into these sheds each time a weft yarn is inserted during the consecutive cycles.
  • the ground warp yarn supply is provided on warp yarn beams, for instance a tension warp yarn beam and a binding warp yarn beam. From those beams the backing warp yarns are conducted to the weaving machine. Before the yarns reach the shed forming means they are separated into two layers situated above one another. An upper layer with the backing warp yarns, which are needed to weave the upper backing fabric and a lower layer with the backing warp yarns, which are needed to weave the lower backing fabric.
  • each yarn separating cylinder In order to prevent the backing warp yarns from becoming slack in one of their two positions, each yarn separating cylinder has to be installed exactly in the bisector plane of the respective shed. It is known to attach these yarn separating cylinders to the weaving machine by means of a holding device enabling the holding height to be adjusted and to be adjusted in the warp-direction.
  • the separating cylinders are connected to respective holders, which extend horizontally in the warp-direction towards the yarn beams. These holders are provided with a number of holding bores separated from one another in the warp-direction.
  • a vertical cylindrical bar which is fixed to the frame of the weaving machine, extends through a holding bore of both holders. In this manner, the holders are provided on the bar in a slidable manner and they may be attached to this bar at a height as desired by means of a clamp joint. These clamp joints are fixed by means of a bolted joint.
  • the position of the separating cylinders is adjustable in the warp-direction by using another holding bore.
  • this known device has a number of important disadvantages.
  • the holder When adjusting a new holding height of the separating cylinders, after loosening the clamp joint, the holder remains in its original position on the vertical cylindrical bar because of its self-clamping action. Only when driving a wedge into the clamp opening, the clamp joint opens all of a sudden and the separating cylinder will move downwards or upwards under the influence of its own weight and/or under the influence of a tractive force, exerted on the separating cylinder by the warp yarns. Because of this, the original adjustment will be totally lost.
  • adjusting a separating cylinder at a new holding height it is however desirable that the original holding height can be used as a reference.
  • the original position should be marked or measured first before loosening the clamp joint.
  • the new position can be compared with the original position either by referring to this marking, or by measuring once again the new position and by comparing the new measured value with the measured value of the original position. Therefore adjusting the separating cylinders is a complicated and time-consuming job and, moreover, it cannot be done with great precision.
  • the purpose of this invention is to provide a device to separate the warp yarns on a face-to-face weaving machine by means of which the above-mentioned disadvantages can be remedied and which therefore will enable the holding height to be adjusted in a simple and exact manner under safer conditions.
  • this goal is achieved by providing a device to separate warp yarns on a face-to-face weaving machine, which has the characteristics mentioned in the first paragraph of this description and the holding device of which comprises a threaded adjusting means, whereas the adjusting means is provided in such a manner that its rotation causes the separating means to be moved, because of which the holding height is changed and whereas the adjusting means can maintain the separating means at the holding height adjusted.
  • the holding height of the separating means can be changed by rotating a threaded adjusting means.
  • a similar adjusting is particularly simple and can be done with great precision. Because the adjusting means is also provided to hold the separating means at the adjusted height, during this adjusting operation, any unwanted and dangerous upward and downward movements of the separating means, under the influence of its weight and/or the tractive force of the warp yarns, are avoided. Therefore, with the device according to this invention, adjusting the holding height can be done in a far more exact and simple manner, and under safer conditions than with the known devices.
  • the adjusting element is attached rotatably at a fixed height and this element is provided to move the separating element by means of its screw thread.
  • the adjusting element may be carried out as an adjusting element (for instance an adjusting spindle) attached at a fixed height with a threaded handle extending vertically, engaging in a bore of the separating element or of a part connected to it, so that the rotation of the adjusting spindle in the bore causes the adjusting means to be moved up or down (depending on the sense of rotation).
  • an adjusting element for instance an adjusting spindle
  • a threaded handle extending vertically, engaging in a bore of the separating element or of a part connected to it, so that the rotation of the adjusting spindle in the bore causes the adjusting means to be moved up or down (depending on the sense of rotation).
  • the holding device is also provided to adjust the position of the separating element in the warp-direction.
  • the holding device can also be carried out with a movable intermediate part to which the separating means is connected, the position of the separating element being adjustable in the warp-direction with respect to the intermediate part and the adjusting means being provided to move the intermediate part in order to adjust the holding height.
  • the holding device comprises also a fixedly attached support, whereas the adjusting means makes a connection between the support on the one hand and the separating means, or a part connected to this separating means, on the other hand.
  • the intermediate part is attached in a movable manner on a part of the support extending in a practically vertical direction a device is obtained with a holding height that can be adjusted in a very easy and accurate manner.
  • reference marks such as a graduation for instance, are provided on a part of the holding device to be fixedly attached to it, in order to determine or read the position of the intermediate part with respect to the support.
  • reference marks for instance dots, lines, numbers, letters
  • graduation the corresponding position of the intermediate part can be easily determined or read for the different holding heights. For instance, this position can be read very easily on a graduation with numbers. Because of this it will become very simple to adjust a holding height without measuring or without any other means, one or more other holding heights being used as a reference. If the distance between the reference marks has been chosen to be sufficiently small, this will also enable the holding height to be adjusted with far greater precision than with the other devices known at this moment.
  • the holding means comprises a support connected to the separating means which is connected to the said intermediate part in a manner slidable in the warp-direction. Because of this, adjusting in the warp-direction can be carried out in a more simple manner and with a greater number of different positions than with the known devices mentioned above.
  • reference marks such as for instance a graduation
  • This also enables to determine or to read the corresponding position of the holder for different positions in the warp-direction. Because of this, adjusting in the warp-direction may be realized in a more accurate and simple manner. Also when adjusting in case one or more other positions in the warp-direction should be used as a reference, this becomes very easy without measuring or any other means.
  • the holding device further comprises also clamping means to maintain the intermediate part in a position adjusted with respect to the support and to maintain the holder in a position adjusted with respect to the intermediate part.
  • these clamping means are bolts provided in a same clamping block with cover.
  • the intermediate part is crossed by a part of the support extending in a practically vertical direction and by a part of the holder extending in the warp-direction.
  • the said clamping means are provided at the intersection of these two parts crossing the intermediate part.
  • the device according to this invention is carried out with two separating means and for each separating means a holding device having one or more of the particular characteristics mentioned above. Because of this the holding height of each separating means can be adjusted in a simple and accurate manner and without any safety risks, so that each yarn layer can be conducted over the respective separating means to the weaving machine at the ideal height. Then both holding devices can best be carried out with respective adjusting means and intermediate parts means working together with a common support.
  • a face-to-face weaving machine provided with a device to separate the warp yarns according to this invention is also within the scope of this invention.
  • tension warp yarn and binding warp yarn is stored on warp yarn beams (14),(15) respectively.
  • These backing warp yarns are conducted to the weaving machine in two layers (16),(17) situated above one another.
  • the upper layer (16) contains the tension and binding warp yarns for weaving the upper backing fabric.
  • the lower layer (17) contains the tension and binding warp yarns for weaving the lower backing fabric.
  • shed forming means an upper shed (18) is formed between the warp yarns of the upper layer (16) and a lower shed (19) is formed between the warp yarns of the lower layer (17).
  • these sheds (18),(19) weft threads are inserted, so that together with the warp yarns of each layer (16),(17) they constitute a respective backing fabric.
  • each yarn separating cylinder (1),(2) is accurately adjusted at a holding height coinciding with the bisector plane of a respective shed (18),(19). Further the position of the yarn separating cylinders (1),(2) should be adjustable in the warp-direction.
  • This holding device comprises a holding bracket (9), which is attached to the main frame (13) of a face-to-face weaving machine.
  • This holding bracket (9) has an elongated vertical central part piece (10) with an essentially rectangular cross-section and an upper and a lower transversely running end piece in which bores have been provided for means of attachment.
  • Two pushers (7),(8) with a vertical crossing opening and a crossing opening extending in the warp-direction are provided slidably on the vertical central piece (10). In this position the central piece (10) extends through the vertical opening. This opening has a rectangular form corresponding with the cross-section of the central piece (10).
  • the pushers (7),(8) are slidable on the central piece (10) of the holding bracket (9) and, in a certain position, they can be moved upwards by means of a respective adjusting spindle (11),(12).
  • the upper adjusting spindle (11) is attached rotatably to the upper extremity of the holding bracket (9) and has a handle extending vertically downwards, which is threaded. This handle extends through a vertical bore of the upper pusher (7).
  • the lower adjusting spindle (12) is rotatably attached to the lower extremity of the holding bracket (9) and has a handle, extending vertically downwards, which is threaded. The handle of the lower adjusting spindle (12) extends through a vertical bore of the lower pusher (8).
  • the upper (7) and the lower pusher (8) By rotating their respective adjusting spindle, the upper (7) and the lower pusher (8), can be moved up and down by the action of the thread, sliding over the central piece (10) of the holding bracket (9). The position of the pushers (7),(8) can be read on a graduation (not represented in the figure), applied to the vertical bracket (9).
  • the separating cylinders (1),(2) provided above one another are connected to a respective holder (3),(4), which is provided with an elongated slat (5),(6) having a rectangular cross-section.
  • an opening of a rectangular form is also provided, crossing the pusher in the warp-direction.
  • the latter slats (5),(6) slidably extend in the warp-direction, through the latter opening of a respective pusher (7),(8).
  • a graduation (not represented in the figures) has been provided to read the horizontal adjustment.
  • a clamping block with cover is provided to fix the adjusted position by tightening the clamping bolts (not represented in the figures).
  • adjusting the separating cylinders (1),(2) is quite a bit simpler.
  • the clamping bolts are loosened.
  • the separating cylinders (1),(2) cannot fall or move upwards, because the adjusting spindles (11),(12) keep the pushers (7),(8) in their places.
  • the vertical adjustment is obtained by rotating the adjusting spindles (11),(12) and the adjustment attained is read on the graduation.
  • the adjustment in the warp-direction is carried out by sliding the slats (5),(6) in the pushers (7),(8) while the adjustment is read on the graduation. Finally the clamping bolts are tightened again. Adjusting can be carried out in a particularly accurate manner and gives no cause to temporarily unsafe situations.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP02076298A 2001-04-20 2002-04-02 Device for separating warp yarns on a face-to-face weaving machine Expired - Lifetime EP1260621B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE200100266 2001-04-20
BE2001/0266A BE1014127A3 (nl) 2001-04-20 2001-04-20 Inrichting voor het scheiden van kettinggarens op een dubbelstukweefmachine.

Publications (2)

Publication Number Publication Date
EP1260621A1 EP1260621A1 (en) 2002-11-27
EP1260621B1 true EP1260621B1 (en) 2005-11-02

Family

ID=3896944

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02076298A Expired - Lifetime EP1260621B1 (en) 2001-04-20 2002-04-02 Device for separating warp yarns on a face-to-face weaving machine

Country Status (4)

Country Link
US (1) US6769456B2 (nl)
EP (1) EP1260621B1 (nl)
BE (1) BE1014127A3 (nl)
DE (1) DE60207002T2 (nl)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1015103A3 (nl) * 2002-09-11 2004-10-05 Wiele Michel Van De Nv Werkwijze voor het weven van een poolweefsel.
CN104032439A (zh) * 2014-05-26 2014-09-10 苏州潮盛印花制版实业有限公司 一种电磁经线调节装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2460512A (en) * 1944-06-26 1949-02-01 Baumwoll Spinnerei & Weberei W Variable warp tensioning means
US2649864A (en) * 1951-04-24 1953-08-25 Jr Mayer Mayer Attachment for weaving high density fabrics
US3394739A (en) * 1966-03-31 1968-07-30 Riegel Textile Corp Apparatus for making plush fabrics
ES343795A1 (es) * 1967-07-22 1968-09-16 Balaguer Golobart Perfeccionamientos en los dispositivos tensores de los hi- los de urdimbre llamados de pelo en telares de terciopelo.
DE3307301A1 (de) * 1983-03-02 1984-09-06 Hergeth Hollingsworth GmbH, 4408 Dülmen Vorrichtung zur herstellung von kurzketten, insbesondere fuer gewebemuster in der buntweberei
BE1008130A4 (nl) * 1994-03-11 1996-01-23 Wiele Michel Van De Nv Grondkettinggarenscheidings- en spanningsinrichting voor dubbelstukweefmachine, in het bijzonder voor tapijt- en fluweelweefmachines.

Also Published As

Publication number Publication date
US6769456B2 (en) 2004-08-03
DE60207002D1 (de) 2005-12-08
US20020166596A1 (en) 2002-11-14
BE1014127A3 (nl) 2003-05-06
EP1260621A1 (en) 2002-11-27
DE60207002T2 (de) 2006-06-01

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